EP4445478A1 - Bandleitervorrichtung, ausgebildet, um in wechselstrom gespeiste elektrische maschinen, insbesondere motoren, eingesetzt zu werden - Google Patents
Bandleitervorrichtung, ausgebildet, um in wechselstrom gespeiste elektrische maschinen, insbesondere motoren, eingesetzt zu werdenInfo
- Publication number
- EP4445478A1 EP4445478A1 EP23822249.1A EP23822249A EP4445478A1 EP 4445478 A1 EP4445478 A1 EP 4445478A1 EP 23822249 A EP23822249 A EP 23822249A EP 4445478 A1 EP4445478 A1 EP 4445478A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strip conductor
- conductor elements
- conductor device
- elements
- cross
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
- H02K3/14—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots with transposed conductors, e.g. twisted conductors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/04—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of windings prior to their mounting into the machines
- H02K15/0414—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of windings prior to their mounting into the machines the windings consisting of separate elements, e.g. bars, segments or half coils
Definitions
- the invention relates to a strip conductor device, designed to be used in alternating current-fed electrical machines, in particular motors, comprising at least two elongated, in particular rigid strip conductor elements with contact devices for coupling in and coupling out electrical current, wherein the strip conductor elements provide a current path and the strip conductor elements form a layer arrangement with electrical insulation in between, according to the preamble of claim 1.
- Röbel conductors or Röbel rods usually consist of several individual conductors that swap places once over the length of the conductor in the course of a full transposition length (for the term full transposition length, see in particular DE 10 2012 218 986 A1, Fig. 1 and 2, "V", and the associated description) (so that each individual conductor is back in its original position after the swap - only further along the length of the Röbel conductor).
- each partial conductor in a wound coil changes its position. This is particularly important with regard to minimizing alternating current losses and reducing coupling losses.
- a Röbel conductor typically covers an extension of very many full transposition lengths and is characterized by a large number of twisted individual conductors capable of carrying high currents.
- the permanent swapping of the positions of the individual conductors over the length of the conductor ensures that a conductor runs temporarily on the inside, i.e. with a smaller winding radius, and then again on the outside, i.e. with a larger winding radius.
- Röbel rods are rods produced by twisting square profile wires.
- the profile wires can be brought together in the Röbel tool in such a way that sections with untwisted, parallel profile wires and sections with twisted profile wires are continuously lined up next to one another, and that the frontmost strand section in the untwisted area is periodically separated from the strand as a Röbel rod.
- a double Röbel rod for the winding of an electrical machine is known from DE 197 54943 Al.
- sub-conductors are arranged in four adjacent stacks. Two adjacent sub-conductors are guided as a sub-conductor pair next to each other over the entire length of a conductor and are twisted together. To achieve the desired twist, the sub-conductors are bent both parallel and crossed in order to achieve optimal compensation of the transverse and radial fields of an electrical machine in operation.
- CH 15177 A discloses a device for producing interlocking flat conductors.
- the slots of the stator irons of an alternating current machine there are stacked rods of a coil made of several interlocking flat conductors. After emerging from the slot, free rod ends extend axially to the start of end connections.
- WO 2022/029008 A1 which goes back to the applicant, relates to a method for the additive manufacturing of a three-dimensional component with at least one electrical conductor, in particular with at least one conductor winding, preferably a coil, preferably a hairpin for an electrical machine, in particular an electric motor or generator.
- the electrical conductor is realized by applying a construction material layer by layer and locally selectively solidifying the construction material by irradiation with a beam impinging on the construction material in such a way that the conductor comprises first regions and at least one second region, wherein the first regions are at least partially separated by the at least one second region in a cross section perpendicular to the longitudinal direction of the conductor.
- the at least one second region has a lower conductivity than the first regions.
- the regions with different conductivity can be used to easily create structures during additive manufacturing that have a positive effect on the flow of current, in particular reduce eddy current effects.
- strip conductor device which is designed to be used in alternating current-fed electrical machines, in particular electric motors.
- the strip conductor device should be able to be produced cost-effectively and with high production efficiency and, in addition, should have further improved electrical properties compared to the prior art, in particular reduced losses due to the skin effect and help to achieve high fill factors.
- the strip conductor device with strip conductor elements is based on the idea of producing the individual strip conductor elements separately and processing them using conventional methods, such as forging or pressing, in order to ensure the high productivity mentioned above.
- the manufactured strip conductor elements can then be joined to the strip conductor device, cut to length as required and connected at the ends.
- the strip conductor device has at least two elongated, rigid strip conductor elements with contact devices for coupling in and coupling out electrical current, wherein the strip conductor elements provide a current path.
- the strip conductor elements form a layer arrangement with electrical insulation in between.
- strip conductor elements are stacked on top of each other.
- the strip conductor elements swap places in relation to their position in the stack, i.e. top or bottom, at least once over the length of their conductor, particularly during a full transposition section.
- This position change is achieved without twisting or distortion by complementary step changes of the strip conductor elements carried out by means of material deformation.
- the cross-sectional surface shapes of the strip conductor elements vary in the region of the step jumps.
- the cross-sectional area is preferably at least largely the same if the cross-sectional area shape varies.
- the desired constant formation of the cross-sectional area avoids or minimizes hotspots in the strip conductor device.
- the geometric surface shape can be used to achieve frequency adjustment with regard to the aforementioned use in alternating current powered electrical machines, in particular motors.
- the cross-sectional area (at least one cross-section, possibly all cross-sections) in the area of the step jumps or in the area of at least one step jump (and/or in the area of at least one recess, in particular the wide-side recess of the strip conductor element) is adapted to the cross-sectional area of the remaining sections of the strip conductor elements (in particular at least at one cross-section of the step jump at least substantially equal to a cross-sectional area of at least one remaining, possibly all remaining, sections of the strip conductor elements that are not within a step jump).
- this is a high level of uniformity and constancy of the cross-sectional areas that is to be aimed for.
- the step jumps preferably each have complementary, strip conductor element-width-side recesses, which further preferably interlock as a result of the joining of the stack (and in particular thus create the desired compact arrangement).
- the stack arrangement of the strip conductor device preferably comprises at least two strip conductor elements, each with at least one or at least two step jumps, wherein the respective ends of the strip conductor elements are electrically connected.
- the strip conductor device is part of a rectangular coil or forms so-called hair pins of electrical machines.
- the strip conductor device can only be provided in a subset of a number of individual pins (hair pins) of a coil and/or electrical machine (or in all pins).
- the strip conductor device can be provided in at least 1%, preferably at least 8%, more preferably at least 25% and/or at most 90%, preferably at most 70%, more preferably at most 50% of the pins. This allows the advantages of the strip conductor device to be used in a targeted and metered manner.
- pins are equipped with the strip conductor device, and pins further out are not.
- the strip conductor elements are preferably stacked closely together and/or at least almost gap-free and/or densely and with a thin insulating layer in between.
- the insulating layer can be introduced in a continuous process when joining the strip conductor elements to form the strip conductor device between opposite surface sides of the strip conductor elements.
- the thickness (dl) or (or) the layer thickness of the insulating layer is many times smaller than the thickness (d2) of the strip conductor elements (e.g.: dl ⁇ 0.5*d2 or dl ⁇ 0.1*d2 or dl ⁇ 0.05*d2 and/or dl > 0.001*d2 or dl > 0.005*d2).
- the thickness or the layer thickness of the insulating layer can be made extremely small due to the small potential differences between the strip conductor elements, so that the desired compact design of the strip conductor device with a correspondingly high fill factor is achieved for the intended use.
- the strip conductor elements can be produced by material deformation.
- solid-surface strip materials with a preferably rectangular cross-section can be deformed, preferably in such a way that one or more step jumps are formed.
- the joining of the strip conductor elements to obtain the strip conductor device can be carried out automatically.
- the production of the strip conductor device in particular if it forms a hairpin geometry or comprises such a geometry, can be carried out conventionally, in particular by bending and/or welding. In general It can be a (simple) replacement of hairpins with the present strip conductor device.
- the strip conductor elements of the strip conductor device are preferably arranged one above the other (in cross section, in particular perpendicular to the longitudinal extension) (at least outside the respective step or steps and/or outside of at least one recess, in particular the wide-side recess of the strip conductor element) and/or over at least 50% or at least 90% of their length) in (only) one row.
- a Röbel rod in which at least two rows are arranged next to each other, space can be saved in this way.
- the strip conductor elements of the strip conductor device are preferably arranged (in cross-section, in particular perpendicular to the longitudinal extension) (at least outside the respective step jump or the respective step jumps and/or outside of at least one recess, in particular the wide-side recess of the strip conductor element, and/or over at least 50% or at least 90% of their length) so that they are not next to each other.
- a Röbel rod in which (in cross-section) at least two rows are always arranged next to each other, space can be saved in this way.
- the strip conductor elements of the strip conductor device can run in the same direction (at least outside the respective step jump or the respective step jumps and/or outside of at least one recess, in particular the strip conductor element wide-side recess, and/or over at least 50% or at least 90% or at least 95% of their length).
- the respective center lines of the strip conductor elements of the strip conductor device can be identical (at least outside the respective step jump or the respective step jumps and/or outside of at least one recess, in particular strip conductor element broadside recess, and/or over at least 50% or at least 90% or at least 95% of their length) in a vertical projection onto a bottom side of a lowest and/or a top side of an uppermost layer (generally: outside of an outermost layer).
- the strip conductor device and/or the respective strip conductor can have at least or exactly two layers, or at least or exactly three layers, or at least or exactly four layers.
- the strip conductor device and/or the respective strip conductor can have at least one or exactly one, or at least two or exactly two, or at least four or exactly four, or more layer jumps (step jumps). At least or exactly two layer jumps (step jumps) can in total represent a transposition to the next but one (or, with a corresponding number of layer jumps/step jumps, the third but one or even further away).
- a (single) layer jump or step jump can lead (immediately) from one layer to the next or even further layer
- the strip conductor device may comprise at least two or exactly two, or at least three or exactly three, or more strip conductors.
- the (respective) step jump (or layer jump) is preferably provided in a respective active region of the strip conductor or the strip conductor device.
- at least one or exactly one, or at least two or exactly two, or at least three or exactly three, or more transpositions (layer jumps) can be present in the (respective) active region of a stator slot (per strip conductor device).
- the (respective) step jump or the step jumps are preferably arranged in such a way that a (maximum) suppression or reduction of eddy current and/or loop current losses within an overall winding (overall copper winding) occurs.
- step changes are arranged within the active area of the stator or motor at constant distances from one another.
- the strip conductor device can be configured as a haripin or as a replacement for (conventional) hairpins and/or within a profile wire winding, in particular to minimize eddy current losses within the winding.
- the ribbon conductor device can be configured or used alternatively or in addition to stranded wire.
- Fig. 1 is a perspective view of a strip conductor device, joined by bringing together two strip conductor elements according to the invention, which are already provided with an enveloping insulation layer;
- Fig. 2 is a side view similar to that of Fig. 1, but with embedding of an insulating layer in the joining process of two strip conductor elements with step jumps for producing the strip conductor device;
- Fig. 3 is a schematic side view of an alternative embodiment of a strip conductor device
- Fig. 4 shows a strip conductor device designed in a U-shape (to form a hairpin) in an oblique view
- Fig. 5 is a schematic sectional view of a stator with strip conductor devices according to an embodiment
- Fig. 6 is a view similar to Fig. 5 according to a further embodiment.
- Fig. 7 is a representation analogous to Fig. 5 according to a further embodiment.
- the strip conductor device consists of two strip conductor elements 1; 2 which are stacked on top of each other.
- the strip conductor elements 1; 2 exchange their positions in relation to the position in the stack over their conductor length in the course of a full transposition section VS (cf. Fig. 2, where VS is indicated schematically and ends at the beginning of the position jump, which then completes the full transposition).
- the strip conductor element 1 is located in the left-hand section according to Figure 1 above and changes its position downwards via a step SP.
- strip conductor element strip conductor section
- the cross-sectional shape of the strip conductor elements 1; 2 varies.
- a cross-sectional area of at least one cross-section (if applicable, all cross-sections) in the region of a (respective) step jump corresponds to at least 0.6 times, preferably at least 0.9 times and/or at most 1.5 times, preferably at most 1.1 times the cross-sectional area of at least one cross-section (if applicable, all cross-sections) of the respective strip conductor outside the step jump.
- a (minimum) width of a respective strip conductor in the region of a (respective) step jump is smaller than a width of the corresponding strip conductor outside the step jump, preferably by at least 10% or at least 30% smaller and/or by at most 80% smaller.
- a (maximum) thickness (height) of a respective strip conductor in the region of a (respective) step jump is greater than a thickness of the corresponding strip conductor outside the step jump, preferably by at least 10% or at least 50% greater and/or by at most 200% greater.
- the cross-sectional area in the region of the step jumps SP is at least substantially adapted to the cross-sectional area of the remaining sections of the strip conductor elements 1; 2 and is designed to be the same if possible.
- the step jumps SP each have complementary, strip conductor element width-side recesses 3, which interlock as a result of joining the gap (see Figure 1).
- a strip conductor device with two strip conductor elements 1; 2 is obtained, starting from a view of Figure 1 from right to left, which are stacked closely, gap-free and densely, so that a compact arrangement is created.
- a thin insulating layer 4 is introduced between the strip conductor elements 1; 2 during the process of stacking the strip conductor elements 1; 2 on top of each other (see Figure 2).
- This insulating layer 4 can already be preformed with regard to the contour in the area of the step jumps SP or can also consist of a material which assumes the shape of the strip conductor elements 1; 2 in the area of the step jumps when they are brought together and joined.
- the strip conductor elements 1; 2 can consist of a solid copper or copper alloy material, which is advantageous for more effective and cost-effective production.
- solid surface strip materials with a preferably rectangular cross-section can be deformed in such a way that the step jumps SP relevant here are formed and the joining of the strip conductor elements 1; 2 to Obtaining the strip conductor device can be carried out in a simple automated manner.
- Fig. 3 shows a schematic side view of an alternative embodiment of a strip conductor device.
- the strip conductor device comprises strip conductor elements 11; 12; 13, which form three layers and can have several step jumps (for example from a lowest or first layer shown in the figure to a middle or second layer and from there to a highest or third layer).
- Fig. 4 shows a strip conductor device designed in a U-shape (to form a hair pin).
- only one transposition layer jump
- at least one or exactly one, or at least two or exactly two, or at least three or exactly three, or more transpositions (layer jumps) can be present in the (respective) active area of a stator slot (per strip conductor device).
- a schematic sectional view of a stator 14 is formed with a plurality of strip conductor devices 21; 22; 23; 24; 25; and 26 (within the stator slot).
- the exact number of strip conductor devices depends it is not mandatory here. It can be seen that all strip conductor devices are designed according to the basic principle of the present disclosure (according to claim 1).
- several inner strip conductor devices are designed according to the basic principle of the present disclosure (specifically four, which is not intended to be limiting) and further (here specifically two) strip conductor devices that are located further out, without corresponding step jumps according to the present disclosure.
- specifically two thirds of the strip conductor devices (which is not intended to be limiting) are designed with step jumps according to the present disclosure.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
- Windings For Motors And Generators (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022132247.5A DE102022132247A1 (de) | 2022-12-05 | 2022-12-05 | Bandleitervorrichtung, ausgebildet, um in Wechselstrom gespeiste elektrische Maschinen, insbesondere Motoren, eingesetzt zu werden |
| PCT/EP2023/084214 WO2024121095A1 (de) | 2022-12-05 | 2023-12-05 | Bandleitervorrichtung, ausgebildet, um in wechselstrom gespeiste elektrische maschinen, insbesondere motoren, eingesetzt zu werden |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4445478A1 true EP4445478A1 (de) | 2024-10-16 |
Family
ID=89222114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23822249.1A Pending EP4445478A1 (de) | 2022-12-05 | 2023-12-05 | Bandleitervorrichtung, ausgebildet, um in wechselstrom gespeiste elektrische maschinen, insbesondere motoren, eingesetzt zu werden |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4445478A1 (de) |
| JP (1) | JP2025538721A (de) |
| DE (3) | DE102022132247A1 (de) |
| WO (1) | WO2024121095A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021119414A1 (de) | 2021-07-27 | 2023-02-02 | Additive | Drives GmbH | Verfahren zur Herstellung eines Stators |
| DE102025107343A1 (de) * | 2025-02-26 | 2026-04-09 | Schaeffler Technologies AG & Co. KG | Flachleitervorrichtung mit Twistbereich im Verbindungsabschnitt, Stator und Verfahren zur Herstellung einer Flachleitervorrichtung. |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH15177A (de) | 1897-09-04 | 1898-04-30 | Wilhelm Decker | Regenerierbare Batterie zur Verwendung für Licht- und Kraftzwecke |
| DE472405C (de) * | 1921-07-26 | 1929-02-27 | Aeg | Wicklungstab fuer elektrische Maschinen |
| DE3923310C1 (de) | 1989-07-14 | 1990-11-29 | Lackdraht Union Gmbh, 2838 Sulingen, De | |
| DE19754943A1 (de) | 1997-12-11 | 1999-06-17 | Asea Brown Boveri | Wicklung für eine elektrische Maschine |
| ITBO20090262A1 (it) * | 2009-04-29 | 2010-10-30 | Magneti Marelli Spa | Macchina elettrica rotante |
| DE102012218986A1 (de) | 2012-09-25 | 2014-04-17 | Siemens Aktiengesellschaft | Rechteckspule mit Roebelleiter und Verfahren zu deren Herstellung |
| US20150114676A1 (en) * | 2013-10-31 | 2015-04-30 | Alstom Technology Ltd. | Conductor bar with multi-strand conductor element |
| EP4193451A1 (de) | 2020-08-06 | 2023-06-14 | Additive | Drives GmbH | Verfahren zur additiven fertigung eines dreidimensionalen bauteiles mit mindestens einem elektrischen leiter |
| GB2603537A (en) * | 2021-02-09 | 2022-08-10 | Univ Bristol | Electrical winding element |
-
2022
- 2022-12-05 DE DE102022132247.5A patent/DE102022132247A1/de active Pending
-
2023
- 2023-12-05 DE DE202023002924.4U patent/DE202023002924U1/de active Active
- 2023-12-05 WO PCT/EP2023/084214 patent/WO2024121095A1/de not_active Ceased
- 2023-12-05 EP EP23822249.1A patent/EP4445478A1/de active Pending
- 2023-12-05 JP JP2025532606A patent/JP2025538721A/ja active Pending
-
2024
- 2024-06-03 DE DE102024115404.7A patent/DE102024115404A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP2025538721A (ja) | 2025-11-28 |
| DE102024115404A1 (de) | 2025-06-05 |
| DE102022132247A1 (de) | 2024-06-06 |
| DE202023002924U1 (de) | 2025-01-27 |
| WO2024121095A1 (de) | 2024-06-13 |
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